In other words, as punishment.
That is not what the selectee list is for.
We disagree. And that's okay. I'm just some schmoe offering an opinion. And that opinion is that if a passenger violently attacks a TSO, it doesn't stop with whatever legal actions are taken; that passenger ends up on a permanent SSSS list. That's the price for taking a swing at a TSO. Don't like it, then don't do it or take the bus.
Before you get your panties in a wad; it will never happen. Political correctness will see to that. But since we're just throwing opinions around, I'm offering mine.
Your mileage may vary.